The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Unknown wire in engine bulkhead connector ???

ERASER5 · 07-07-2008, 09:00 PM

We may have a winner here.

JimKshortstep4X4 wrote in another thread:
"I don't have a picture but if you have the correct harness there should be a red wire and brown wire to be used for hooking up the tach. The red wire goes to the "Unfused ignition" terminal on the fuse panel. The brown wire goes to the terminal on the HEI marked "tach". The tach gets its ground from the case so once you have the two wires hooked up, you should be good to go."

Could it be an unused factory tach wire?

07-07-2008, 09:00 PM	#14
ERASER5 Registered User Join Date: Jun 2006 Location: Indiana Posts: 4,859	Re: Unknown wire in engine bulkhead connector ??? We may have a winner here. JimKshortstep4X4 wrote in another thread: "I don't have a picture but if you have the correct harness there should be a red wire and brown wire to be used for hooking up the tach. The red wire goes to the "Unfused ignition" terminal on the fuse panel. The brown wire goes to the terminal on the HEI marked "tach". The tach gets its ground from the case so once you have the two wires hooked up, you should be good to go." Could it be an unused factory tach wire? __________________ '70 GMC C1500 LWB Power disc brakes. WooHoo! Posi 6 Lug Dana 60